Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Temperatures plummet in Florida this weekend. Here's the cities that could even see snow. Chevron right
Bomb cyclone to focus most of its furious snow on Carolinas. See the forecast. Chevron right

O'Fallon, IL

18°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Illinois

18°
No results found.
Try searching for a city, zip code or point of interest.
Create Account Unlock extended daily forecasts and additional saved locations — all with your free account.
Let's Go Chevron right
Have an account already? Login
settings
O'Fallon, IL Weather
Today WinterCast Local {stormName} Tracker Hourly Daily Radar MinuteCast® Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps
News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel
For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center
Today Hourly Daily Radar MinuteCast® Monthly Air Quality Health & Activities
Friday, January 30

Current Weather

2:39 PM

18°F
Sunny
RealFeel® 19°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
RealFeel Shade™ 13°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
RealFeel®
19°
RealFeel Shade™
13°
Max UV Index
2.2 (Low)
Wind
NNW 6 mph
Wind Gusts
10 mph
Humidity
56%
Indoor Humidity
20% (Very Dry)
Dew Point
5° F
Pressure
↔ 30.40 in
Cloud Cover
0%
Visibility
17 mi
Cloud Ceiling
40000 ft

Day

1/30
19°Hi
RealFeel® 19°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
RealFeel Shade™ 13°
Bitterly Cold
RealFeel Guide
Bitterly Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
Partly sunny and frigid; breezy this afternoon

Max UV Index3.0 (Moderate)

AccuLumen Brightness Index™8 (Bright)

WindNNW 10 mph

Wind Gusts27 mph

Probability of Precipitation1%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover39%

Morning

Afternoon

Night

1/30
3°Lo
RealFeel® -9°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
A flurry this evening; clouds breaking, frigid; extreme cold can be dangerous for outdoor activities

WindNNW 10 mph

Wind Gusts20 mph

Probability of Precipitation42%

Probability of Thunderstorms0%

Precipitation0.00 in

Snow

Hours of Precipitation2

Cloud Cover71%

Evening

Overnight

Sun & Moon

10 hrs 12 mins
Rise 7:07 AM
Set 5:19 PM
Waxing Gibbous
Rise 2:44 PM
Set 6:26 AM

Temperature History

1/30
High
Low
Forecast
19°
3°
Average
44°
23°
Last Year
46°
29°
Record
68°
2013
-4°
2019

Further Ahead

Hourly

Daily

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Winter Weather

Bomb cyclone to focus most of its furious snow on Carolinas

2 hours ago

Winter Weather

Florida bracing for coldest conditions in decades by Sunday

1 hour ago

Winter Weather

NYC’s 'snow hot tubs' have already melted 23 million of pounds of snow

3 hours ago

Weather Forecasts

Spring forecast: Wintry weather isn’t finished yet in parts of the US

1 day ago

Winter Weather

"Severe winter of 2025-26" to continue for weeks in Midwest, Northeast

18 minutes ago

 More Stories

Featured Stories

Astronomy

Full Snow Moon rises Sunday, lighting up winter’s coldest nights

1 day ago

Winter Weather

100 miles of icy Mississippi interstates closed after trucks got stuck

1 day ago

Weather News

Firefighters battle out-of-control fires in Victoria amid record heat

1 day ago

Winter Weather

Spain sees rare snow from Storm Kristin, after extreme winds in Portug...

23 hours ago

Winter Weather

Will Phil see his shadow on Monday? Groundhog Day predictions

2 days ago
World North America United States Illinois O'Fallon

Weather Near O'Fallon:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, MO
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...